C Primer Plus®, Third Edition

Review Questions

1. What will this program print?

   #include <stdio.h>
   char ref[] = { 'D', 'O', 'L', 'T'};
   int main(void)
   {
     char *ptr;
     int index;
     for (index = 0, ptr = ref; index < 4; index++, ptr++)
        printf("%c %c\n", ref[index], *ptr);
     return 0;
   }
   

2. In Question 1, what storage class is ref?

3. In Question 1, ref is the address of what? What about ref + 1? What does ++ref point to?

4. What is the value of *ptr and of *(ptr + 2) in each case?

   1. int *ptr;
      int torf[2][2] = {12, 14, 16};
      ptr = torf[0];
      

   2. int * ptr;
      int fort[2][2] = { {12}, {14,16} };
      ptr = fort[0];
      

5. What is the value of **ptr and of **(ptr + 1) in each case?

   1. int (*ptr)[2];
      int torf[2][2] = {12, 14, 16};
      ptr = torf;
      

   2. int (*ptr)[2];
      int fort[2][2] = { {12}, {14,16} };
      ptr = fort;
      

6. Suppose you have the ...